incentreincentern.
/ˈɪnsɛntə/ Geometry.
The centre of an inscribed circle.
ΘΚΠ
the world > relative properties > number > geometry > point > [noun] > forming a centre
centrec1392
centre of magnitude1599
radial point1738
incentre1882
1882 C. Smith Conic Sections (1910) 351 The three external bisectors of the angles of a triangle meet the opposite sides in three points on a straight line which is perpendicular to the join of the in-centre and circum centre.
1903 E. H. Askwith Course Pure Geom. i. 12 The pedal triangle has for its incentre the orthocentre of the original triangle.
1904 H. S. Hall & F. H. Stevens School Geom. iii. 204 Given the base and vertical angle of a triangle, find the locus of the in-centre.
1963 R. A. Rosenbaum Introd. Projective Geom. & Mod. Algebra i. 3 Prove that the bisectors of the angles of a triangle are concurrent. (The point of concurrency is the center of the inscribed circle, abbreviated ‘incenter’.)
This entry has not yet been fully updated (first published 1933; most recently modified version published online June 2018).
incentreencentrev.
/ɪnˈsɛntə//ɛnˈsɛntə/ rare.
transitive. To centre in something; to place or fix in the centre.
ΘΚΠ
the world > space > relative position > central condition or position > mark or be the centre of [verb (transitive)] > centre in something
concentre1600
centre1603
incentre1611
revolve1815
sphere1852
1611 J. Florio Queen Anna's New World of Words Incentrare, to encentre, or goe to the midle or centre.
1623 Williams Let. to Dk. Buckingham 15 June in Hacket Life i. (1692) 135 Nor is your Love incentred to me only in your own Breast.
1843 E. Jones Stud. Sensation & Event 111 Encentred in this meadow, one revolved Inquiring gaze.
This entry has not yet been fully updated (first published 1900; most recently modified version published online December 2018).
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n.1882v.1611